Prime Minister Shigeru Ishiba proposed modifying a plan for Japan's Nippon Steel Corp. to acquire United States Steel Corp. into an investment during his summit with U.S. President Donald Trump in Washington, a government source said Sunday.The revised plan, which had been discussed in advance with Nippon Steel, involves making a significant investment in the struggling U.S. producer instead of seeking full ownership, according to the source.Ishiba said on a TV program the same day that U.S Steel would remain an American company regardless of how the plan proceeds.Japan's largest steelmaker…READ FULL ARTICLE